Qin Hongfei originally thought that the machine was not made successfully, but it turned out that Qin Yun lied. She was speechless for a moment.

Qin Yun was also embarrassed in the face of everyone's gaze, and he forced himself to explain, "I just tested it for you to see if it works." Yes, that's it, "But it works quite well, but I don't know if it's stable."

Qin Hongfei also had concerns in this regard, so she naturally focused her attention on Xiaobai, oh no, Tang Jinnan and Shou.

Shou said speechlessly, "Don't joke."

How could they possibly try such an unknown thing with their identities? However, before he finished speaking, he saw his friend had already walked up. He immediately swallowed his words, and his frown showed his disapproval.

Tang Jinnan silently stretched out his white and slender hand to Qin Hongfei.

Qin Hongfei put the bracelet on him, so fast as if she was afraid that he would regret it the next second.

After everything was ready.

Qin Yun and Qin Fei quickly gathered around, and she casually asked, "Name, answer the truth."

"Tang Jinnan."

"Age, answer a lie."

"Thirty."

The data value jumped when answering the truth and the lie.

Qin Hongfei asked another question, she asked, "What is the name of the person you like, answer the truth."

Tang Jinnan's eyes suddenly turned to her.

At the side, Shou suddenly frowned.

Qin Hongfei didn't understand, and subconsciously touched her face, thinking that something was stained, "Why are you looking at me like that? Answer the question!"

Qin Yun and Qin Fei immediately cast their gossipy eyes over.

Tang Jinnan originally suspected that Qin Hongfei was using her power to gossip for personal gain, but seeing her expression, he knew that he had over-guessed. She was just testing. After he put away the thought, he calmed down and said, "No."

Shou walked around the machine. The value was within the normal range, which showed that Tang Xiaojin was not lying.

He looked at Qin Hongfei, then at his friend, and he said nothing.

Qin Hongfei did not notice Shou's little move, and even if she did, she would not care. After seeing that the value was stable, she sighed, "Single dog."

Tang Jinnan did not understand what single dog meant, but from Qin Hongfei's expression, he could tell that it was not a good word, so he decided not to ask.

The next test went smoothly.

Shou also tested it, and the three people tried it, and they all proved that the machine was reliable.

Qin Hongfei was very satisfied. Her money was not wasted. She looked at Tang Jinnan with clear eyes and said, "Give me your opinion from your professional perspective. If this machine is to be sold, how about it?"

Tang Jinnan's cold eyes showed a look of assurance.

The first one asked in confusion, "What do you mean?"

Tang Jinnan buttoned up his sleeves politely, "Do you think she is testing the function for you to see?"

Didn't the first one swallow back the words under the gaze of the two people? Damn, I always feel that I will be regarded as a fool if I say it out loud.

Tang Jinnan looked at the equipment and said lightly, "Heart rate monitoring has always been a medical device, only suitable for hospitals and research. When it can be modified into a portable household item, what do you think?"

The first one was stunned, and quickly answered without thinking, "Grab it!"

There are many men, women and children with heart problems in the world! However, this kind of testing often requires going to the hospital and having professional equipment to do the testing, which is very troublesome.

But if there is such a device on the market in the central city! It would be a great blessing for those patients with this disease at home.

Ordinary people are not allowed to talk about it! But those who have some money will rush to buy it and are willing to buy it.

After all, the cost of treatment in this area is not low, very high.

The function of this thing is not just as simple as home use!